Work step 6: Diagnostic of Heated oxygen sensor

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When indicated on display

Fig 1: VAG1551 Scan Tool Display - Generating Readiness Code: Diagnostic Of Heated Oxygen Sensor (1 Of 2)

Courtesy of AUDI OF AMERICA, INC.

Press buttons -0-, -4- and -1- to select display group number 041 and confirm with -Q- button.

When indicated on display

Fig 2: VAG1551 Scan Tool Display - Generating Readiness Code: Diagnostic Of Heated Oxygen Sensor (2 Of 2)

Courtesy of AUDI OF AMERICA, INC.

Check specified value in display field 1 and 3:

NOTE: Increasing engine speed accelerates the obtaining of specified values.

DISPLAY GROUP 041: OXYGEN SENSOR HEATER, BANK 1 AT IDLE

	Display fields
	1	2	3	4
Display group 041: Oxygen sensor heater, bank 1 at idle
Display	xxx kOhm	Heater before TWC ON	xxx kOhm	Heater behind TWC ON
Indicated	Bank 1, Sensor 1 internal resistance of sensor before TWC that creates sensor voltage	Condition of heater	Bank 1, Sensor 2 internal resistance of sensor behind TWC that creates sensor voltage	Condition of heater
Work range		Heater before TWC ON		Heater behind TWC ON
		Heater before TWC OFF		Heater behind TWC OFF
Value	0 to 0.9 kOhm	Heater before TWC ON	0 to 0.9 kOhm	Heater behind TWC ON
Note	See the Note underneath DISPLAY FIELDS OXYGEN SENSOR HEATER, BANK 2 CHART		See the Note underneath DISPLAY FIELDS OXYGEN SENSOR HEATER, BANK 2 CHART

Press -C- button.
Press buttons -0-, -4- and -2- to select display group number 042 and confirm input with -Q- button.

DISPLAY GROUP 042: OXYGEN SENSOR HEATER, BANK 2 AT IDLE

	Display fields
	1	2	3	4
Display group 042: Oxygen sensor heater, bank 2 at idle
Display	xxx kOhm	Heater before TWC ON	xxx kOhm	Heater behind TWC ON
Indicated	Bank 2, Sensor 1 internal resistance of sensor before TWC that creates sensor voltage	Conditions of heater	Bank 2, Sensor 2 internal resistance of sensor behind TWC that creates sensor voltage	Condition of heater
Work range		Heater before TWC ON		Heater behind TWC ON
		Heater before TWC OFF		Heater behind TWC OFF
Value	0 to 0.9 kOhm	Heater before TWC ON	0 to 0.9 kOhm	Heater behind TWC ON
Note	See note below		See note below

Important note for display groups 41 and 42: Display fields 1 and 3:

Display fields 1 and 3 will not indicate any value if the operating temperature of the oxygen sensors is not reached, that means both fields are empty. (Increase Engine Speed to reach specified value).
After the operating temperature is reached, the display fields 1 and 3 must display a value of less than 0.9kOhm
Oxygen sensor control of oxygen sensor behind Catalytic Converter (Bank 1; Sensor 2 and Bank 2; Sensor 2 is not active without engine load.
Only proceed with test after value of less than 0.9kOhm is displayed with in display fields 1 and 3.

Press -C- button.